摘要:
An adhesive useful in making composites includes two components A and B. Component A includes at least one polymer having a molecular weight (Mn) of at least 800 that has at least one functional group polymerizable by irradiation with UV light or with electron beams and has at least one functional group capable of reacting with a compound having at least one acidic hydrogen atom. Component B includes at least one compound having a molecular weight (Mn) of from about 100 to about 8000 which has at least two functional groups polymerizable by irradiation with UV light or with electron beams.
摘要:
The invention pertains to a composition containing an activator system for free-radical polymerizations and a free-radical polymerizable compound of the general formula II: �H.sub.2 C.dbd.CR.sup.1 --C(.dbd.O)--O--R.sup.2 --O--C(.dbd.O)--NH--Q--NH--C(.dbd.O)!.sub.2 �{--O--R.sup.4a --O--C(.dbd.O)--NH--Q'--NH--C(.dbd.O)}.sub.m --O--R.sup.4a --O--!(II) wherein m is from 0 to 10; R.sup.1 is hydrogen or a methyl group; R.sup.2 is a linear or branched chain alkyl group containing from 2 to 6 carbon atoms or an alkylene oxide containing from 4 to 21 carbon atoms; Q and Q' independently are aromatic, aliphatic or cycloaliphatic groups containing from 6 to 18 carbon atoms which are derived from the basic diisocyanate or diisocyanate mixtures; and R.sup.4a is derived from a polyesterdiol having a C:O ratio of >2.6, a C:H ratio of
摘要:
The invention relates to moldable, radically polymerizable multicomponent mixtures, which may even be present in the form of storable multicomponent systems, containingethylenically unsaturated, polymerizable compounds, if desired in admixture with soluble and/or insoluble fillers and/or other auxiliaries, andan activator system initiatable by contact with oxygen,characterized in that, in their in-use form, the multi-component mixtures are present as at leastly slightly thickened material and contain an activator system based on the following principal components which can be initiated by contact with ambient air:N-alkyl-substituted tert.-arylamines containing at least one aliphatic CH bond in the .alpha.-position,metal compounds at least partly soluble in the system to accelerate the drying of unsaturated oils, andweakly acidic carboxylic acids having pK.sub.s values no lower than about 0.9.In their in-use form, the multicomponent mixtures preferably have a minimum viscosity of at least about 50 to 100 mPa.s. The invention also relates to the use of the activator systems of these mutlicomponent mixtures for the time-controlled hardening--with a predeterminable pot-life--of olefinically unsaturated systems by contact with ambient air at room temperature or only moderately elevated temperatures.
摘要:
The invention relates to moldable, radically polymerizable multicomponent mixtures containingethylenically unsaturated, polymerizable compounds, if desired in admixture with soluble and/or insoluble fillers andan activator system initiatable by contact with oxygen,and is characterized in that these multicomponent mixtures contain an activator system based on the following principal components which can be initiated by contact with oxygen and water and, in particular, by contact with ambient air:N-alkyl-substituted tert-arylamines containing at least one aliphatic CH bond in the .alpha.-positionmetal compounds at least partly soluble in the system to accelerate the drying of unsaturated oils andcompounds of weakly acidic carboxylic acids having pK.sub.a values of no less than about 0.9 which can be hydrolyzed to the free carboxylic acid on contact with moisture.The invention also relates to the use of these multicomponent mixtures as an aerobic adhesive system, more particularly in the form of a one-component adhesive packed in storable form, and to their use for surface coating or for the production of plastic moldings.
摘要:
The present invention relates to a polymerization catalyst, comprising at least two components, wherein at least one or more of said at least two components are selected from the group of nitrogen containing heterocycles and/or their derivatives and at least one or more of said at least two components is selected from the group of organic sulfur containing acids and/or derivatives of organic sulfur containing acids.
摘要:
The present invention relates to a catalyst, which is an organic component with electron withdrawing substituents and to compositions with such catalyst and at least one benzoxazine component, and the use of such compositions in adhesives, sealants and coatings.
摘要:
Polymerizable combinations, comprising at least one first component selected from the group of benzoxazine monomers and at least one second component selected from the group of aromatic esters are described. Furtheron the use of aromatic esters as additives to benzoxazine monomers as well as methods of coating a device by heating the above mentioned combination, and a device, coated by that way is explained.
摘要:
The invention relates to a two-component polyurethane adhesive based on a polyol component and a polyisocyanate component. An adhesive bond produced using the adhesive between two steel panels coated with cathodic electrocoat has, at a temperature of −40° C., an impact peel strength as measured by ISO 11343 of at least 11 N/mm. The invention further relates to an additive for polyurethane adhesives and also to the use of said additives.
摘要:
The bondability of a polyolefin, particularly to cyanoacrylate adhesives, is improved by incorporating in the polyolefin a polymerization initiator capable of initiating the polymerization of the monomers constituting the cyanoacrylate adhesive. The polymerization initiator may, for example, be a sterically hindered nitrogen base and may be mixed with the polyolefin at a temperature above the polyolefin's glass transition temperature using, for example, co-extrusion or co-injection methods.
摘要:
The process of curing a radical-polymerizable multicomponent mixture containing an olefinically-unsaturated compound with ambient air by adding to the mixture an alkyl, cycloalkyl or aryl hydrazone of an aliphatic, cycloaliphatic or aromatic aldehyde or ketone which forms a hydroperoxide as an initiator for curing the mixture.